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Finding the Fourth Proportional to 72,588.88, 108,669.40 and 70,800.40

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Solution

The fourth proportional to 72,588.88, 108,669.40 and 70,800.40 is: 105,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,588.88 : 108,669.40 = 70,800.40 : x
  2. Step 2: Convert to fraction form
    72,588.88/108,669.40 = 70,800.40/x
  3. Step 3: Cross multiply
    72,588.88x = 108,669.40 × 70,800.40
  4. Step 4: Simplify right side
    72,588.88x = 7,693,836,987.76
  5. Step 5: Solve for x
    x = 7,693,836,987.76/72,588.88
  6. Step 6: Final answer
    x = 105,991.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.